Block heating for your house?

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In times of rising energy costs, it is advisable to think carefully before building a house how the energy supply and heating of your house can be managed sustainably and inexpensively. Here you will find some helpful information on the subject of block heating.

Heat with block heating
Heat with block heating © Henrik Gerold Vogel / Pixelio

Is block heating efficient?

If you are on decentralized heater and energy generation, block heating - also called a combined heat and power unit - could be an approach that you can consider. With a combined heat and power unit you can generate electricity and heat for your house at the same time.

  • Block heating is offered for different capacities: If you are building a single-family house, becomes a micro-cogeneration unit with an energy output of up to 15 kilowatts for your needs sufficient. Block heaters with an output between 15 and 50 kilowatts are known as mini block power plants. As a rule, they supply multi-family houses with several apartments.
  • The generated current covers your domestic needs or it is fed into the public power grid, so that your electricity bill is significantly reduced. The heat generated, with which your heating and water heating is operated, occurs as residual heat when generating energy. By using the waste heat for heating, a block power plant has an energy efficiency of approx. 90 %. In comparison, gas or oil heating only has an energy efficiency of approx. 60% up.

Block heating - what types are there?

  • Block heaters can be driven by very different engines: Both pilot injection engines and gas-Otto engines, steam engines and Stirling engines are used for combined heat and power plants. Another alternative is a fuel cell block-type thermal power station.
  • Depending on the type of drive, biogas, natural gas, diesel, vegetable oil or Rapeseed oil and methyl alcohol also wood and biomass. Biomass is to be understood as meaning, for example, rotten grain, grass, manure, wood waste, rapeseed or maize. The fuel cell CHP converts hydrogen-rich gases - such as hydrogen, methane, methanol, coal gas, biogas or natural gas - and the oxygen from the air into water around.
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  • The most suitable variant for your requirements results from the individual requirements that your house has.

How economical is block heating?

  • The costs for block heating consist of the investment costs, maintenance costs and the operating costs for the primary energies of the drive. Depending on the power generation capacity, you have to pay investment costs of approx. Calculate € 7,000 to € 40,000 for the module and the integration into the heating system. The energy costs for operating the block heating vary depending on the type of fuel.
  • Such a combined heat and power unit is only profitable if the annual number of operating hours is at least 2500 hours. So you would do well to determine the energy and heat requirements of your house.
  • Combined heat and power plants are also subsidized by the state, and to a considerable extent. The amount of funding depends on the energy capacity generated and the number of hours that the CHP is in operation.
  • You will find a lot of additional information on the Internet about the various models, providers and funding opportunities for combined heat and power plants.

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